Assistant professor at the department of Psychology, Health & Technology. My teaching and research focuses on positive psychology and self-compassion in clinical practice, cognitive behaviour therapy, and the application of technology to therapeutic practice, mostly the use of internet and web-based interventions, and what makes them effective in improving mental health and wellbeing.
Expertise
Psychology
- Mental Health
- Cognitive Behavioral Therapy
- Meta-Analysis
- Cognitive-Behavioral Intervention
- Emerging Adulthood
- Healthcare
- Regression Analysis
- Thematic Analysis
Organisations
Publications
2026
Identifying what works in mental health apps through meta-regression analyses of 169 trials (2026)npj Digital Medicine, 9. Article 336 (E-pub ahead of print/First online). Kraiss, J. T., Fiß, F., Chakhssi, F., Aktas, F. B., Koelen, J. A. & Piano Simões, J.https://doi.org/10.1038/s41746-026-02466-zUitgelicht: De zin en onzin van deepfaketechnologie in rouwbehandeling (2026)PsyXpert, 12(1) (E-pub ahead of print/First online). Lenferink, L. & Koelen, J.https://www.prelumacademy.nl/vakmedia/psyxpert/1dc57fc3-888c-4964-9c4c-af18d9ff5202
2025
Dropout and completion in iCBT for university students: Insights from a thematic analysis (2025)Internet interventions, 40. Article 100831. Koelen, J. A., de Koning, L., Nottage, M. K., Klein, A. M., van der Heijde, C. M., Vonk, P. & Wiers, R. W.https://doi.org/10.1016/j.invent.2025.100831
2024
Temporal associations of emotional and social loneliness and psychosocial functioning in emerging adulthood (2024)Scandinavian Journal of Psychology, 65(6), 1141-1152. Mobach, L., Wolters, N. E., Klein, A. M., Koelen, J. A., Vonk, P., van der Heijde, C. M., Wuthrich, V. M., Rapee, R. M. & Wiers, R. W.https://doi.org/10.1111/sjop.13056Web-Based, Human-Guided, or Computer-Guided Transdiagnostic Cognitive Behavioral Therapy in University Students With Anxiety and Depression: Randomized Controlled Trial (2024)JMIR mental health, 11. Article e50503. Koelen, J., Klein, A., Wolters, N., Bol, E., De Koning, L., Roetink, S., Van Blom, J., Boutin, B., Schaaf, J., Grasman, R., van der Heijde, C. M., Salemink, E., Riper, H., Karyotaki, E., Cuijpers, P., Schneider, S., Rapee, R., Vonk, P. & Wiers, R.https://doi.org/10.2196/50503The evaluation of religious and spirituality-based therapy compared to standard treatment in mental health care: A multi-level meta-analysis of randomized controlled trials (2024)Psychotherapy Research, 34(3), 339-352. Bouwhuis-van Keulen, A. J., Koelen, J., Eurelings-Bontekoe, L., Hoekstra-Oomen, C. & Glas, G.https://doi.org/10.1080/10503307.2023.2241626
2022
COVID-19 and mental health among at-risk university students: A prospective study into risk and protective factors (2022)International journal of methods in psychiatric research, 31(1). Article e1901. Koelen, J. A., Mansueto, A. C., Finnemann, A., de Koning, L., van der Heijde, C. M., Vonk, P., Wolters, N. E., Klein, A., Epskamp, S. & Wiers, R. W.https://doi.org/10.1002/mpr.1901
Research profiles
Courses academic year 2026/2027
Courses in the current academic year are added at the moment they are finalised in the Osiris system. Therefore it is possible that the list is not yet complete for the whole academic year.
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